So I bought some stiphodon percnopterygionus a few days ago and have them in a quarantine tank. In my main tank where I plan to put them, I have two Koralia powerheads. I'm kind of worried the perc. will get killed when they go near the koralias as they look small and slim. I had adult shrimps that were ok in the tank but the perc. are smaller in size than the shrimps. I don't want to lose any percs. to the powerheads. I don't like adding mesh to the koralias as stuff get stuck and clogs the powerhead easily. I've found that my fish like to go near the powerheads and rest/search for food. I have one powerhead near the top and one near the bottom of the tank. Will the stiphodons be smart enough not to go near the powerheads?